热冲压淬火关键工艺参数实验研究  

Experimental research on key parameters of quenching process during hot stamping

作　　者：陈炜[1] 杨伟龙[1] 舒泽泉 陈泷[1] CHEN Wei;YANG Wei-long;SHU Ze-quan;CHEN Long(School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China)

机构地区：[1]江苏大学机械工程学院

出　　处：《塑性工程学报》2018年第1期264-268,共5页Journal of Plasticity Engineering

基　　金：博士点基金博导类课题资助项目(20133227110013);江苏大学工业中心大学生创新实践基金资助项目(ZXCXJJ201403)

摘　　要：以硼钢板B1500HS为研究对象,自主搭建了一套可调节接触压强、实时检测板料温度数据的淬火实验装置,在连续淬火背景下待板模温度场处于动态稳定后,对热冲压淬火阶段的保压压强和保压时间两个关键工艺参数进行实验研究。以淬火后试样力学性能和微观组织作为淬火质量评价指标,分析了保压压强和保压时间对淬火质量的影响规律,并确定两者的最优取值范围。研究结果表明：保压压强的增大能显著提高淬火后制件质量并提高淬火效率,且在特定保压压强下有最优保压时间,可在保证淬火质量前提下获得最优淬火效率。针对1.2 mm厚硼钢板B1500HS,当冷却介质为流量10 L·min^（-1）的室温水时,获得合格热冲压淬火质量所需的保压压强应不小于0.5 MPa,且为提高生产效率,最优保压压强应在15 MPa以上;当初始成形温度为850℃时,最佳保压时间为10 s。The boron steel B1500 HS was selected as the research object,and a set of experimental device for quenching,contact pressure adjustable and on-line temperature measuring was developed to research the two key parameters including holding pressure and holding time,in quenching process by continuous quenching experiments when the temperature field of blank and die surface tend to be dynamic stable after several cycles. The mechanical properties and microstructure of quenched specimen were chosen to evaluate the quenching quality,then the effects of holding pressure and holding time on quenching quality were analyzed and their optimal values were determined. The research results show that the increase of holding pressure can effectively improve the quenching quality and efficiency,meanwhile the optimal holding time can be obtained under certain holding pressure,then the optimal quenching efficiency can be obtained under the condition of ensuring the quenching quality. For the 1. 2 mm thickness boron steel B1500 HS,when cooled by water at 10 L·min^（-1） under room temperature,the holding pressure required for eligible quenching quality should beyond 0. 5 MPa and the optimal value should beyond 15 MPa to improve the equenching efficiency. When the initial temperature is 850 ℃,the optimal holding time is 10 s.

关 键 词：热冲压 淬火 B1500HS 保压压强 保压时间 

分 类 号：TG306[金属学及工艺—金属压力加工]